/*
 ** Licensed under the Apache License, Version 2.0 (the "License");
 ** you may not use this file except in compliance with the License.
 ** You may obtain a copy of the License at
 **
 **     http://www.apache.org/licenses/LICENSE-2.0
 **
 ** Unless required by applicable law or agreed to in writing, software
 ** distributed under the License is distributed on an "AS IS" BASIS,
 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 ** See the License for the specific language governing permissions and
 ** limitations under the License.
 */

package com.google.code.geobeagle.shakewaker;

import android.hardware.SensorManager;

class ForceThresholdStrategy {
    public boolean exceedsThreshold(float[] values) {
        double totalForce = 0.0f;
        totalForce += Math.pow(values[SensorManager.DATA_X] / SensorManager.GRAVITY_EARTH, 2.0);
        totalForce += Math.pow(values[SensorManager.DATA_Y] / SensorManager.GRAVITY_EARTH, 2.0);
        totalForce += Math.pow(values[SensorManager.DATA_Z] / SensorManager.GRAVITY_EARTH, 2.0);
        totalForce = Math.sqrt(totalForce);
        double abs = Math.abs(1.0 - totalForce);
        return abs > 0.1;
    }
}
